Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

Count the number of lines in the image below ?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

What has hands, but can’t clap?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?